add creed asyn ex

Author: dmitriz

examples/13-creed-async.js

@@ -0,0 +1,30 @@
+// https://github.com/briancavalier/creed
+// runNode converts Node API with errback into creed promise
+const { runNode } = require('creed')
+
+// standard Nodejs library for file access
+const fs = require('fs')
+
+// readFilePromise :: String -> String -> Promise Error Buffer
+const readFilePromise = (encoding, fileName) => runNode(fs.readFile, fileName, {encoding})
+
+// writeFilePromise :: String -> String -> Promise Error Buffer
+const writeFilePromise = fileName => contents => runNode(fs.writeFile, fileName, contents)
+
+
+readFilePromise('utf-8', 'config.json')
+  .map( contents => contents.replace(/8/g, '6') )
+  .chain( writeFilePromise('config-changed.json') )
+  .map( _ => console.log("Written to 'config-changed.json'!") )
+
+// config.json
+// {
+//   "a": "b",
+//   "port": 8080
+// }
+
+// config-changed.json
+// {
+//   "a": "b",
+//   "port": 6060
+// }

examples/13-task-async.js

@@ -2,7 +2,6 @@
 // part of Folktale https://github.com/origamitower/folktale
 const Task = require('data.task')
 
-// for comparison use
 // https://github.com/Avaq/Fluture
 const Fluture = require('fluture')
 
@@ -27,7 +26,6 @@ const readFileTask = (fileName, encoding) =>
 const readFileFluture = (fileName, encoding) =>
   Fluture.node(done => fs.readFile(fileName, encoding, done))
 
-
 // general purpose Task for writing file
 const writeFileTask = (fileName, contents) =>
   new Task((rej, res) =>

examples/config-changed.json

@@ -0,0 +1,4 @@
+{
+  "a": "b",
+  "port": 6060
+}